I should wait as long as possible before having my trees pruned or fertilized.
The longer you wait to have your trees professionally cared for, the more structurally unsound they can become. Trees in urban areas form bad habits that must be corrected as they grow to prevent them from becoming weak or hazardous. Urban trees do not normally get proper nutrition in proper amounts from urban soils, and various insects and diseases are invited into your landscape by less-than-vigorous trees. The healthier your trees and plants, the less insect and disease problems occur in your yard. Mature trees should be checked annually for unseen internal decay to avoid tree failure, which can damage property and injure or kill people.
